2016 Chevy Silverado LTZ Z71

[D45]

Sound and performance

 

[D45]

2018 trucks must have diff programming and or sensors

I just installed a ported throttle body, ported intake manifold and a cold air intake on my friends 2018 5.3L Denali

The check engine light keeps popping on and it's throwing codes

Runs great with more power, just trying to figure it out

I didn't have, and don't have, any issues with my trucks mods

 

[D45]

Truck popped a check engine light today

P0700 CODE

 

[buellconvert]

Have you checked your transmission fluid, how is the level and condition? From my experience these transmissions are very particular with the fluid level especially, it needs to be just right.

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[D45]

I removed the Range AFM and cleared the code

I will check the fluid level

 

[buellconvert]

I've had a Range AFM device on my 2016 for just shy of a year and haven't had any issues with it, but I did have some shifting issues that I found was from the trans fluid being just a slight bit low, did a fluid and filter swap and it's been great since, but it never popped a code though. Have you felt any shifting issues before or during the code?

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[D45]

What fluid type does the trans take?

I think it shifts funky......but I'm still used to my fully built billet 48RE

 

[D45]

I was checking some things under the hood this morning

A quick disconnect line (vacuum or breather?) going to the intake manifold, on the driver side of the motor wasn't fully seated and wasnt snapped into place over a fitting

Likely my error when I swapped intake manifolds.......I'll see how things are over the next week or two

 

[D45]

Good info on the 8 speed:

8L90E Specs, Performance, and Identification | Drivetrain Resource

The 8L90 is a modern GM automatic transmission. This page will help you identify an 8L90, tell you the vehicle applications that it comes in, goes over the 8L90E technical specifications and performance.

www.700r4transmissionhq.com

MAX HP: 650
MAX TQ: 635

Fluid: Dexron High Performance

Looking at the TSB for harsh and odd shifting, I called my dealership. Its not a recall so I would have to pay GM for the service? Nah, not going to happen

The issue seems to stem from “moisture content in the transmission fluid.” As such, the old GM transmission liquid is swapped for new Mobil 1 Synthetic LV ATF HP fluid. I am going to call around and get a price for a flush and fill

Dexron HP LV fluid is also accepted

 

[D45]

I am also going to start looking at a new battery for the truck........doesnt seem weak, but most are saying 4-5 year life

Rather be safe, than sorry

 

[buellconvert]

Good catch and info on the transmission TSB and fluid, I don't have the 8 speed myself, I've got the 6 speed

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[SoTxAg06]

My 19 has the 8 speed. Zero issues in 16K miles. It did randomly throw a code, but it had something to do with me rocking the truck hard when loading a 4 wheeler without the parking break set.


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[D45]

Anyone know what the factory battery size or any specs on it?

Advanced Auto says that either the H6 r H7 is an exact fit

Both are the same price and I have a $50 off battery coupon

DieHard Platinum AGM:

The H6 is rated for:
950 CA
760 CCA
70 AH
45.6 pounds
AGM

H7 is rated for:
1000CA
850CCA
80 AH
51.8 pounds
AGM

 

[D45]

I realized I never took off the negative cable on the battery when I previously installed the ported intake manifold

I have been debating taking it off and installing the stock part

After talking with the porting owner......i took the negative cable off and let it sit for 30 min

Truck drives alot better and has more low end ! Duh

 

[buellconvert]

So does that put it into a type of relearn when you remove the negative cable?

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